In kindergarten, a child is selected for the role of a gray mouse for a matinee. The parents of some of the children participating in the casting are directly related to art. Dad, a film director, dad, a theater director and mom, a singer, begin to prepare their children for the final viewing. Everyone has their own method of rehearsals and their own life, not devoid of problems and contradictions. A recently divorced filmmaker cannot start a new relationship with a prop girl he likes. The theater director is going through a creative crisis and is constantly striving to get home to his beloved wife and children. The self-obsessed singer is raising her daughter alone. They don't even suspect that a simple song about a gray mouse will help solve some of these problems.